When brothers and professional aviators Nick and Giles English launched a collection of watches in memory of their RAF pilot father, Euan, in 2007, they insisted that their Bremont timepieces had to be as sturdy and precise as a fighter jet. Accordingly, their latest BC-S2 automatic chronometers (right), inspired by original World War II aircraft instruments, are powered by Bremont’s BE-36AE movements, which are based on the ETA 2836. Bremont (www.bremont.com; available at Barneys, 800.926.5393) hand-assembles the COSC-certified pieces in its Biel-Bienne atelier, appointing them with custom skeletonized rotors. For strength and scratch resistance, Bremont bombards the three-piece, 43 mm cases with electrons, using a proprietary method that achieves a Vickers hardness rating of 2,000, about nine times the strength of ordinary stainless steel used for watch cases. Mount Everest climber Jake Meyer and around-the-world yachtsman Mike Golding have tested the watches, giving the Swiss timepieces a thoroughly British hazing and ensuring that their robust design will stand up to even the most bracing English sport.